panic! does not warn about failing to provide an argument

[shepmaster]

I expected panic! to behave like println! and warn me that I have a formatter argument that is unused. Tested with Rust 1.18.0.

println!

println!("{:p}"); 

error: invalid reference to argument `0` (no arguments given)
 --> src/main.rs:2:5
  |
2 |     println!("{:p}");
  |     ^^^^^^^^^^^^^^^^^
  |
  = note: this error originates in a macro outside of the current crate

panic!

panic!("{:p}");

thread 'main' panicked at '{:p}', src/main.rs:4

[ollie27]

dupe of #22932

[shepmaster]

Thank you, @ollie27, I couldn't find that with a few minutes of searching 😊